Ex. 15. If the angles of depression of the upper and lower ends of a lamp post from the top of a hill of height
h metres are a and B respectively, then show that the height of the lamp post in metres) is
h sin (B-a)
(EAMCET)
cos a sin B
Sol Let AR be the bill of height Ja metres and Pobe the last of hob atmas
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Answer:
cos a sin
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